Machine for beveling glass



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MACHINE FOR BEVELING GLASS.

No. 591,936. Patented Oct. 19,1897.

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4 sheets-#sheet 3. R. A. SCHLEGEL.

MACHINE POR BEVELING GLASS. y

Patented Oct. 19, 1897.

(No Model.)

4 Sheets-skelet (No Model.)

R. A.y SGHLBGBL.

MACHINE POR BBVBLING GLASS.

Patented Oct. 19, 1897.

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UNITED STATES PATENT OFFICE.

ROBERT A. SCHLEGEL, OF ST. LOUIS,'MISSOURI, ASSIGNOR TO THE SCHLEGELPATENT BEVELING MACHINE COMPANY, OF MISSOUR.

MACHINE FOR BEVELING GLASS.

SPECIFICATION forming part of Letters Patent No. 591,936, dated October19, 1897.

Application filed December 21, 1896. Serial No. 616,530. (No model.)

T @ZZ whom t may concern: frame; means for raising and lowering the Beitknown that I, ROBERT A. SCHLEGEL, pivotal line of said table; means forcontrol- 55 a citizen of the United States, residing at St. ling theangle or pitch of the table and con- Louis, State of Missouri, haveinvented cersequently the pitch of the edge of the plate tain new anduseful Improvements in Maglass carried thereby; a suitable carriagechines for Beveling Glass, of which the folcarrying a rotatinggrinding-disk for operatlowing is a full, clear, and exact description,ing against the edgeof the glass plate; suit- 6o reference being had tothe accompanying able mechanism for rotating the grindingdrawings,forming a part hereof. disk and impelling the carriage; suitable rero Myinvention has relation to improvements versing mechanism controlled bythe movein machines for beveling glass plate; and it ment of thecarriage; and in addition the consists in the novel arrangement andcornpresent device consists of a special rotating 65 bination of partsmore fully set forth in the radially-armed disk for feeding the sand orspecification and pointed out in the claims. other material to thegrinding -disk of a In the drawings, Figure 1 is a sideelevaspring-actuated feeding device for the table tion of the machine.Fig. 2 is a top plan andglass plate mounted thereon; of a feedviewthereof. Fig. 3 is a front view with the regulating device automaticallyactuated by 7o supporting table or bed removed. Fig. 4 is the travel ofthe carriage; 'of a screw for an enlarged view of one end of the bar byarresting the feed at the close of the grind- 2ov which the plate isfirmly held against the ing operation, and of further and other detableand the supporting-arm therefor. Fig. tails .to be particularlyspecified in the de- 5 is a section on line of Fig. 4, but showtaileddescription, which is as follows: 75 ing an end view of the arm. Fig. 6is a de- Referring to the drawings, 1` represents the tail plan View ofthe rotating armed disk for terminal supporting-standards of the frame 25 feeding the sand to the grinding disk or block. of the machine, thesame being connected at Fig. 7 is a side elevation of the reciprocatingtheir upper ends by the longitudinal beams carriage, showing thesand-trough in section; 2 2, the inner faces of each of which are pro-8o and Fig. S is a front elevation of the bracket vided at their lowerand upper edges with carried by the carriage for supporting the thebevel tracks or guideways 3 3, over which 3o spindle of the sand-feedingdisk. is adapted to reciprocate or ride the trans- The present inventionis an improvement verse tool-carriage 4, having terminal arms 5 on theconstruction of beveling-machine covembracing the bevel-tracks abovereferred 85 ered by United States Letters Patent granted to. Verticallymounted-in suitable bearings to me on the 3d day of December, 1895, andof said carriage is the grinding-disk shaft 6 numbered 550,695, thefeatures of improvewhose lower end carries a grinding-disk 7. mentresiding, primarily, in the means for Keyed to the shaft Y 6 within thehousing automatically feeding the grinding material formed by theframework of the carriage is 9o or sand to the disk by which the bevelis cut a pinion 8, which meshes with the teeth of a on the glass plate;in the means for preventlarge gear-wheel 9,loosely revolving or passed4o ing undue scattering of the sand as it is feed over a second shaft10, mounted in the carfrom the trough containing the same; in the riageparallel to the disk-shaft, the said gearmeans for gradually feeding theplate against wheel 9 having formed integral therewith a 95 the grindingdisk or block; in the means for pinion l1, which in turn meshes with theregulating the rapidity of such feed; in the teeth of a large gear-wheell2, carried loosely means for limiting or arresting the feed at on theshaft G. The gear-wheel l2`has formed the ',close of the bevelingoperation, and in integral therewith a pinion 13, which meshes furtherdetails whose advantages will be betwith the teeth of a large gear-wheel14, keyed roo ter apparent from a detailed description of to the shaft10. By this system of differthe machine. ential gearing a rapid rotationimparted to 5o Like the particular construction of the patthe shaft 6 istransformed into a comparaented device above referred to, the presenttively slow one when it reaches the shaft 10. machine comprisesgenerallyasuitable frame; The upper end of the shaft 10 carries a pin-105 a pivoted or tilting table carried by said ion 15, which meshes witha rack-bar 16, carried by the free ends of the arms 17', mounted on oneof the longitudinal beams 2. It is apparent, therefore, that as rapidrotation is impartedV to the disk-shaft 6, the carriage 4 in which saidshaft is mounted is caused to travel slowly along the tracks 3, beingimpelled along said tracks by the pinion 15, meshing with the rack-bar16. inasmuch as the edge of the glass to be beveled must be swept overby the grinding-disk 7 several times before the beveling of the same iscompleted, it is apparent thatv some provision must be made forreciprocating the carriage back and forth in the path of the edge ofsaid glass to be beveled, and to reverse the direction of rotation ofthe grinding-disk with each reciprocation. It is apparent from theforegoing gear construction that if the grindingdisk be reversed at theend of each stroke of the carria-ge, this action would reverse the4direction of rotation of the pinion 15 and cause the carriage to travelor reciprocate in the opposite direction. It is therefore suficient toprovide the necessary mechanism for reversing the rotation of thegrinding-disk 7 at the end of each stroke of the carriage carrying saiddisk. This is accomplished by suitable reversing mechanism cooperatingwith the mechanism which imparts motion to the disk-shaft 6, and whichjointly cooperate as follows:

Mounted vertically in suitable bearings at the opposite ends of t-heframe of the machine are the shafts 17, their lower ends carrying bevelfriction gear-wheels 18 and their upper ends bein'g provided with theiianged -beltpulleys 19, over which is stretched the drivebelt 20, oneof the laps of said belt passing between the pulley 21, carried at theupper end of the disk-shaft 6, and the idle-pulleys 22, revolving insuitable bearings in the carriage-frame. The friction between thebeltlap and the pulleys is sufficient, during the travel of the belt, toimpart rotation to the pulley 2l, and consequently to the disk-shaft 6,the direction of rotation of said shaft and consequent direction ofrectilinear travel of the carriage depending of course on the directionin which the belt is driven. The belt is driven first one way and thenthe other by the following mechanism: It has been stated that the lowerend of each shaft 17 carries a bevel friction gear-wheel 18. Now, eachof these bevel-wheels 18 alternately is brought into engagement with aterminal friction bevel gear-wheel 23, carried at opposite ends of themain drive-shaft 24, provided with fast and loose pulleys 25 and 26,respectively, said shaft 24 being susceptible of a slightlongitudinalreciprocatin g motion in its bearings, a motion which willbe just sufcient -to bring into engagement with the bevel-wheel 1S firstone of the terminal bevel-wheels 23 at one end, and then bring thecorresponding parts into engagement at the opposite end of the machine.It is obvious that this alternate engagement and disengagement of thefrictionbevels 23 and 18 will set into motion in one direction first oneof the shafts 17 and then the other in a reverse direction, and theseactions in turn will cause the drive-belt to travel, and thegrinding-disk to rotate, first in one direction and impel the carriage 4along its tracks in one direction, ,and then to reverse the n10- tion ofthese parts and cause the carriage to.

reciprocate in the opposite direction.

The mechanism by which the rotating driveshaft 24 is automaticallybrought .into engagement iirst with one of the shafts 17 and then withthe other -is as follows, the said mechanism being denominated thereversing mechanism: Disposed longitudinally within suitable bearings ofthe machine-frame is a shifting bar 27, provided with a suitable handle28 at one of itsouter projecting ends. lVithin a suitable notch in saidbar there cooperates the free end of an arm 29, carrying the upper endof a vertically-mounted rock` shaft 30, said shaft being carried insuitable bearings on the outside of the frame, and the lower end of saidrock-shaft having secured theretoa second arm 31, to the free end ofwhich is pivotally secured a connecting-rod 32, whose opposite end ispivotally secured to one end ofv a shifting lever 33, pivoted inasuitable bearing 34, carried by the machineframe, the free end of saidlever embracing the shaft 24, between the collars 35. From theconnections just described, it is apparent that if the bar 27 be shiftedsufliciently in 'its bearings to rock the shaft 30 through the medium ofthe arm 29, the shaft 30 will oscillate the arm 31, causing the latterto tilt the lever 33, under which circumstances the free end of saidlever will longitudinally shift the drive-shaft 24 within its bearings asufficient distance to cause one or the othercof the frictionbevel-wheels 23 to engage with its corresponding bevel 18, theparticular bevel 18 engaged depending on the direction in which theshaft 30 is rocked. In other words it depends on the direction in whichthe bar 27 is shifted. f

In the operation of the machine, the shifti ing of the bar 27 first inone direction and thenin the other is accomplished by the-travelingcarriage at the end of its stroke as follows: The carriage is providedwith a depending lug 36, which is adapted to strike or impinge againstan adjustable dog 37, held in any desirable position along the bar 27 bymeans of a binding-screw 38. It is apparent that the moment the lug 36strikes one of the v dogs 37 it will shift the bar 27 sufficiently tocause the latter, through the'intermediate connections alreadydescribed, to bring into engagement one of the bevel friction gearwheels23 of the. drive-shaft with its coperating bevel-wheel 18. Then when thecarriage strikes the dog at the opposite end, the friction gearwheels atthat end willv be brought into engagement and the mechanism will bereversed, causing the carriage to travel in the reverse direction andthe grinding-disk to revolve in the opposite direction. This can be keptup indefinitely until the mechanism is stopped by the operator. Thelengths of the strokes of the carriage will depend on the distance thatthe dogs 37 are spaced apart on the bar 27, and this distance will inturn depend on the width or size of the plate of glass to be ground andbeveled. To stop the machinery, the bar 27 can be seized by the handle28 and shifted to a position as to just disengage both the bevels 23 4ofthe drive-shaft from the bevels 18 on either` side of the machine; orthe drive-belt (not shown) which operates the pulleys 25 and 26 could beshifted from the fast to the loose pulley, in which event the machinerywould also come to a stop.

In the line of travel of the carriage and below the rotating disk 7 isdisposed a trough 40 for holding the grinding materialsuch as filings,sand, and the like. Secured along the under surface of the carriage andto one side of the disk-shaft 6 is a bracket 41, within the compass ofwhich the grinding-disk revolves. Depending from the under surface ofthe medial portion of the base thereof is an angular bearing 42, whichis adapted to support the spindle 48 of the revolving radially-armedsand-feeding wheel 44, the free ends of whose arms are split so as tobetter seize and force the sand or other suitable grinding materialcarried in the trough against the under surface of the grinding-disk, itbeing remembered that the wheel 44 is substantially wholly or partiallysubmerged in the grinding material contained in the trough. The upperend of the spindle 43 is connected by a universal joint 45 to the lowerend of the shaft l0, mounted in the carriage. Carried by the oppositevertical walls of the bracket 4l and disposed along the inner surfacesthereof are lugs or ledges 46, serving to jointly su pport theprotecting casing or hood 47, surmounting the grinding-disk and thefeed-wheel, it being understood that the said hood is provided withsuitable openings for the free passage therethrough of the shaft 6 andspindle 43. The said feeding-wheel is disposed at an angle to the planeof rotation of the grinding-disk, and is so mounted as to direct thesand against the under surface of the grinding-disk adjacent to the lineor surface of contact of the latter with the edge of the glass plateoperated on. It is clear that as the carriage travels back and forthover the trough, the radiating arms of the feed-wheel will throw thegrinding material against the grinding-disk, the hood 47 interceptingsuch material and preventing undue scattering and loss thereof; and itis obvious that the grinding material will in turn be carried up underthe rotating disk and between it and the plate by the centrifugal actionof the disk.

It is now in order to describe the operatingtable on which theplate-glass is mounted; the means for varying the elevation of said CABtable; the means for adjusting the angle of the table by which the pitchor angle of the bevel edge of the glass is determined; the means forautomatically feeding the freeedge of the table and plate mountedthereon against the grinding-disk; the means for regulating the amountof saidfeed, and the device for limiting or arresting the feed uponcompletion of the grinding operation. The table 48 is a fiat bed havingsupporting ribs or beams 49. To each of the lateral or outer ribs ispivoted, by means of a forked connection 50, a segmentalsupporting-arm51, whose lower end is adapted to enterasuitable cavity or depressionformed at the base of the frame for its reception, the outer curvedsurface of the arm being provided with a toothed rack 52, which isadapted to cooperate With the pinion 53, forming part of or secured tothe shaft 53 of a worm gear-wheel 54, operated by a worm-pinion 55 atone end of a shaft 56, mounted 'in suitable bearings 57 along the baseof the outside of the frame, said shaft being actuated by a hand-wheel58, carried at the opposite end thereof. It is clear that if thehand-wheel 58 is turned in one direction or the other, the table will beraised or lowered at its pivotal points according to the direction inwhich the hand-wheel is turned. The table is pivoted along a line aboveits center of gravity, the tendency of 'the lower end thereofaccordingly being to drop and keep the upper end of the glass v plate'59,

mounted thereon, in contact with the under 62 and controlled by ahand-wheel 63, a coiled' spring 64 being interposed between the blockand the under surface of the tilting table, (the spring being in fact'carried by the block.) The tendency of the springs 64 is to force theupper swinging end of the table and plate carried thereon against thegrinding-disk, and with a force dependent on the degree of initialcompression imparted to the springs 64, which will of course depend onthe proximity 'to which the blocks 60 had been originally to avoid a toorapid feed of the glass against the grinding-disk consequent upon theresilient action of the springs 64 and the tilting tendency ofthejtable, I provide a feed-regu- IOO IIO

lating device actuated automatically bythe This feed-regulating devicemay be described as follows: Mounted in suitable bearings at each end ofthe frame, and in the path of the reciprocating carriage, is a rotatablestaff or rod 65, Whose inner end bears against the upper surface of thearm 66, carried at each end of the upper edge ofthe table. The upperportion of each staff is screw-threaded, the said screw-threaded portionoperating in a similar screw-threaded bearing, and the upper end of thestaff being provided with a hand-wheel 67, along the under surface ofwhose rim are formed a series of depending pins 68, adapted to be struckseriali/m by the free end of one of the yielding arms 69, secured to thereciprocating carriage. The arm 69 in thus striking the pin at the endof one stroke or reciprocation of the carriage advances or rotates thehand-wheel 67 sufficiently to bring the next succeeding pin intoposition to be struck by the same arm 011 the return stroke of thecarriage. The carriage in its reciprocations thus alternately operatesrst one hand-Wheel and then the other, thus gradually unscrewing thestaffs or rods and permitting the feeding of the table and plate carriedthereby toward the grindingdisk just so fast and no faster. The arms 69are made yielding slightly, so that their free ends can readily pass thepin, which as a result of the impact Was shifted to a position to beoperated on with the next succeeding stroke of the carriage. Of course,in starting to grind any'particular plate of glass, the staffs 65 arefirst screwed down by hand to -the proper position, the lower endsthereof of course always bearing against the arm 66, whatever maybe theinitial angle of the table. It may be stated in passing that a heavyplate of glass mounted exclusively above the pivotal axis of the tablewould have a tendency to shift the center of gravity of the table, andmight even cause the latter to tend to tilt away from the grinding-disk,a tendency which of course would be arrested and overcome by the feedingmechanism bearing against the under surface of the upper end of thetable.

The angle of the bevel edge of the plate will of course depend on theinitial position of the line connecting the pivotal supports of the arms5l and on the degree of feed or tilting of the table thus supported.This angle is determined by the index 70, marked along the outer edge ofone of the arms 5l and coperating with the edge of the socket in whichthe lower end of the arm is received, the index being first marked bycaretilting of the table altogether-I provide suitable shoulder-screws71, mounted on each side of the frame, the bases of the said screwsbeing adapted to bear against the arms 66 of the table and arrestfurther tilting of the latter the moment the plate has been beveled tothe desired degree.

To rmly hold the plate-glass on the bed or table, I place a transverseretaining channelbar 72, provided at the outer surface of its base witha cushioning-layer of rubber or equivalent material 73, adapted to comein contact with the plate. The s'aid bar is suspended between the freeends of the arms 6,6,

and in a mechanical manner, whereby theV same can be readily adjusted toand from the table for the accommodation of plates of variablethicknesses. ing said bar is best indicated in Figs. 4 and 5. Passedthrough the free end of each arm 66 is the trunnion or cylindricalextension 74 of a block 75, guided between the walls of the slot 7 G,formed in each of the terminal walls of the bar, a cover-platev 77,spanning and covering the open end of the slot. Passed through ascrew-threaded opening of the sliding block 75 is a screw 7 8, havingareduced basal portion or bearing79, supported in a cavity at the baseof the channel-bar and having an upper cylindrical extension 80, passingthrough the plate 77, the said exten- The manner of mount-v sion 8Ohaving a polygonal continuation 81,

by means of which the screw-7 8 can be operated by a nut-wrench orsimilar tool. The plate 77 of course serves to hold thescrew in place;and upon the turning of the screw in one direction or the other theposition of either block 75 relatively to the base of the channel-bar isregulated, and hence the distance between the base of the channel-barand the bed or table of the machine is carefully adj usted, the weightof the channel-bar being capable of holding the plate against the bedwith any degree of firmness.

Itis of course obvious that the present machine might be altered in manydetails without departingfrom the spirit of my invention.

S2 represents an overflow-pan for the mixture contained in thesand-trough.

Having described my invention, what I claim isl. In a machine forbeveling glass, a suitable traveling carriage, a grinding disk or block'IOC IOS

IIO

the rotation of the latter, substantially as set forth.

3. In a machine for beveling glass, a suitable tilting table, atraveling carriage mounted in proXimity thereto, a rotatinggrinding-disk mounted thereon, means for automatically feeding the edgeof the plate carried by the table, into contact with the grinding-disk,and rotatable feed-regulating devices normally bearing against the tableand adapt-ed to be actuated by the carriage for regulating the rapidityof feed, substantially as set forth.

4. In amachine forbeveling glass, asuitable tilting table, a travelingreciprocating carriage mounted in proximity thereto, a rotatinggrinding-disk mounted in the carriage, suitable springs forautomatically feeding the edge of the glass mounted on the table againstthe grinding-disk, and means for adjusting and varying the tension ofsaid springs, substantially as set forth. l

5. In a machine for beveling glass, a suitable tilting table, atraveling carriage mounted in proximity thereto, a rotatinggrinding-disk mounted in the carriage, suitable springs forautomatically feeding the edge of the glass mounted on the table againstthe grindingdisk during the rotation of the latter, means for adjustingor varying the tension of the springs, suitable rotatable staffs or rodsadapted to bear against the table, and intermediate connections betweenthe staffs and the carriage for intermittently rotating the staffs bythe action of the carriage and unscrewing the same, whereby the actionof the feeding devices located on the opposite side of the table may beregulated, substantially as set forth. Y

G. In a machine for beveling glass, a suitable frame, a tilting tablemounted in connection with said frame, a reciprocating carriage carryinga grinding-disk mounted on the frame and in proximity to one end of thetable, a rotatable staff at each end of the frame adapted to'move byrotation in a direction parallel to itself in the nature of a screw, ahandwheel carried at one end of each staff, a series of pins disposedalong the rim of the wheel, arms carried by the carriage and extended inopposite directions, each arm adapted at the end of each stroke of thecarriage to strike a pin of the wheel at that particular end of themachine, and rotate the handwheel and staff of which it forms a part, adistance equal to the space between any two pins, thereby graduallyunscrewin g the stas, the opposite ends of the staffs being adapted tobear against the end of the table which is adjacent to the path of thecarriage, and suitable feeding devices adapted to press the table andplate carried thereby against the grinding-disk, the rotating staffsbeing adapted to regulate the intensity and vspeed of feed of the tableand plate mounted thereon, substantially as set forth.

'7. In a machine for beveling glass,a suitable frame, a travelingcarriage mounted thereon, a rotating grinding-disk mounted in thecarriage and adapted to come in contact with the edge of the glassplate, a rotating sand-feeding wheel also carried by the carriage, andactuated upon the rotation of the grindingdisk during the travel of thecarriage, substantially as set forth.

8. In a machine for beveling glass,a suitable frame, a reciprocatingcarriage mounted thereon, a rotating grinding-disk mounted inthecarriage and adapted to come in contact with the edge of the glass tobe beveled, a rotating sand-feeding wheel also carried by the carriage,and suitable gearing interposed between the rotating disk and thesand-feeding wheel whereby the latter is operated upon the rotation ofthe disk during the travel of the carriage, substantially as set forth.

9. In a machine for beveling glass,a suitable frame,a traveling carriagemounted thereon, a rotating grinding-disk carried by the carriage, arotating wheel for feeding the grinding material to the grinding-disk, aspindle for the Wheel, a bracket having a bearing for said spindle,intermediate gearing between the grinding-disk and the spindle of thesandfeeding wheel, a hood supported by the bracket and adapted to coverthe grindingdisk and sand-feeding wheel, substantially as set forth.

lO. In a machine for beveling glass, a suitable frame, a table or bedfor the glass, arms pivoted on each side of the table, suitable socketsor cavities formed at the base of the frame for the reception of thelower free ends of the arms, a graduated index carried by one of thearms, said index cooperating with the edge of the socket through whichthe lower end of the particular arm passes, and suitable mechanism forsimultaneously raising or lowering the arms and hence raising orlowering the pivotal axis of the table, substantially as set forth.

ll. In a machine for beveling glass, a suitable frame, a tilting tablemounted in connection therewith, arms disposed on each side of one endof the table, a block having a trunnion supported by the free end ofeach arm, a channel-bar having suitable slots or guideways for theblocks, a screw passed through each block, the base of the screw beingadapted to be supported at one end by IOO IIO

the base of the channel, a cap-plate spanning the open end of the slotor guideway adapted to hold in place the opposite end of the screw,whereby upon the turning of the screw the position of the block isshifted and hence the position of the channel-bar relative to the tableis adjusted, substantially as set forth.

12. In a machine for beveling glass, a suitable sand-feeding wheelcomprising a series of radiating arms, the free end of each arm beingsplit, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.l

ROBERT A. SCHLEGEL. Witnesses:

ALFRED A. MATHEY, EMIL STAREK.

